Getting biodiversity intactness indices right: ensuring that biodiversity reflects diversity

Publication Type  Journal Article
Authors  Faith, D. P.; Ferrier, S.; Williams, K. J.
Year  2008
Name of Journal  Global Change Biology
Volume  14
Number  2
Pages  207-217
Abstract  The 2010 biodiversity target of a significant reduction in the current rate of biodiversity loss presents challenges for effective measurement of changes in global/regional biodiversity. A simple biodiversity intactness index (BII) is attractive in using available data and expert opinion, but is seen to be only weakly linked to biodiversity in its usual sense of variation. An example illustrates how an improved BII score could result even when there are large species losses. A family of alternative biodiversity representativeness indices better reflect variation. They use the same readily available information, plus simple species2013area relationships (SAR) and genetic diversity curves. A new genetic-diversity abundance-fraction curve, like SAR, is linear in log2013log space. The new representativeness indices incorporate, through range-abundance curves, the abundance fraction estimates normally used for BII. Land use or climate change impacts therefore can reflect partial rather than total biodiversity losses at localities. Estimates of biodiversity gains/losses using these indices enable a novel regional planning-based approach for addressing the 2010 target.
DOI  10.1111/j.1365-2486.2007.01500.x
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